360 Feeding Saccharomyces cerevisiae fermentation product affected rumen pH and fermentation, and site of digestion in finishing beef heifers.
Bibliographic record
Abstract
The objective of this study was to determine the effects Saccharomyces cerevisiae fermentation product (SCFP, NaturSafe®, DiamondV) on ruminal fermentation and site and extent of feed digestion in beef heifers. Five ruminally and duodenally cannulated beef heifers (BW=561 ± 11.7 kg) were used in a 5 × 5 Latin square design with 28-d periods (21-d adaption and 7-d data collection). Five treatments were: 1) control diet (10% barley silage and 90% barley concentrate, DM basis); 2) control diet supplemented with antibiotics (ANT; 330 mg/d monensin and 110 mg/d tylosin); 3) ruminal (top dress) delivery of SCFP (rSCFP; 18 g/d SCFP); 4) duodenal delivery of SCFP (dSCFP; 18 g/d SCFP); and 5) combination of rSCFP and dSCFP (rdSCFP; 18 g/d rSCFP and 18 g/d dSCFP). Data were analysed using MIXED procedure of SAS with model including fixed effect of treatment and random effects of heifer and period. Intake of DM tended (P<0.10) to be greater with rdSCFP than control (13.0 vs. 12.2 kg/d). Heifers fed rSCFP vs. control diet showed greater (P<0.05) minimum ruminal pH (5.30 vs. 5.02), shorter (P<0.10) duration of ruminal pH (5.6 vs. 11.6 h/d) and greater (P<0.10) acetate proportion (51.8% vs. 47.2%). Truly fermented OM was greater (P<0.03) with rdSCFP (7.2 kg/d) than other treatments (5.9 kg/d). Treatment with rSCFP and rdSCFP vs. control showed greater(P<0.05) ruminal digestibility of OM (63.8 vs. 53.1%) and NDF (52.7 vs. 41.3%). Total tract digestibility of OM (P<0.07) and NDF (P<0.01) was greater with rSCFP (80.7 and 67.7%) and rdSCFP (81.7 and 66.1%) than control (77.2 and 56.2%) and ANT (77.4 and 55.1%). These results demonstrate that supplementation of SCFP improved ruminal pH status and ruminal digestibility of OM and NDF, with limited effects on nutrient digestibility in the intestine and suggest the SCFP could serve as natural alternative for antibiotics for beef cattle.
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.001 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one source (direct Gemma or distilled Codex), not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".